capability, talent

(せいのう) Capability (of a machine) i.e. “The new iphone has more 性能 than a regular 携帯.”   TTT
(さいのう) Talent (of a person). Usually used about hand-skills:surgery, piano, violin, painting. Unlike 能力 (which comes from arduous physical training)、才能 has the feeling of something inborn or heaven-sent.   PPP
(のうりょく) Person’s capability. Usually used about one’s body, which has been trained to do something by a lot of exercise:  運動能力 (physical prowess – how fast she can run, how much he can lift), 身体能力 (ditto).   PPP